The news arrived via Sunday night's (March 4) episode of Keeping Up With the Kardashians. The reality star previously requested that her doctor tell Kylie her baby's gender first, so while she was on a trip to San Francisco with Kim and Kourtney, the youngest Kar-Jenner called to make the announcement.

"You're having a girl!" she exclaimed, to which Khloe responded, "You're lying!"

"I'm not lying," Kylie insisted. "I'm so excited for you Khloe!"

Apparently, Khloe had been convinced she was having a boy, and was reluctant to embrace that she was, in fact, having a daughter. "When you have your mind made up as to what you're having, like everyone told me you're going to feel what you're having and you'll just kind of know. And then when you find out it's the complete opposite it's just a shock," she explained. "I just was convinced that I was having a boy, so to be having a girl it's just like, ‘OK that wasn't what I thought was going on.'"

The 33-year-old is currently expecting her first child with boyfriend Tristan Thompson. She's reportedly eight months pregnant, though her exact due date is unknown.